asyncrat | ae799c3696cadbbe3a8d2036f67685e01f385f214f47b0c7d094a15159688e71

General

Target

RuntimeBroker.exe
Size

63KB
MD5

251e7183331025aac57c3965ca6bdb3b
SHA1

b7d7e6f953bf378dae8d9f666369d8e60e405e95
SHA256

ae799c3696cadbbe3a8d2036f67685e01f385f214f47b0c7d094a15159688e71
SHA512

0209d2916ec0a1c67043e04c2c4ce9a3b6401d437791581887fe3ba17f2eefdec35fe2adc79704868a1750977f0b9fb7a29c3fe68d4df9b5a494988757e1b453
SSDEEP

768:+uw6LVcsTPq781wC8A+XjGDp4b+tlbBH11+T4pSBGHmDbDG5phQWoXeYQTJKZGSv:PeQPcmlTOYUbch05qKxulkpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

udmansoud-59712.portmap.host:59712

Mutex

ikU2zF吉诶T8تXω比9ΖNIר

Attributes

delay
1
install
true
install_file
svchost.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1764-54-0x0000000000BE0000-0x0000000000BF6000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\svchost.exe	asyncrat
C:\Users\Admin\AppData\Roaming\svchost.exe	asyncrat
behavioral1/memory/2040-68-0x0000000000E70000-0x0000000000E86000-memory.dmp	asyncrat
behavioral1/memory/2040-86-0x00000000005F0000-0x0000000000624000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

2040 svchost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1172 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1112 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

RuntimeBroker.exe

pid process

1764 RuntimeBroker.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

RuntimeBroker.exesvchost.exe

description pid process

Token: SeDebugPrivilege 1764 RuntimeBroker.exe
Token: SeDebugPrivilege 2040 svchost.exe

pid	process
2040	svchost.exe

pid	process
1172	schtasks.exe

pid	process
1112	timeout.exe

pid	process
1764	RuntimeBroker.exe

description	pid	process
Token: SeDebugPrivilege	1764	RuntimeBroker.exe
Token: SeDebugPrivilege	2040	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

RuntimeBroker.execmd.execmd.exe

description	pid	process	target process
PID 1764 wrote to memory of 1372	1764	RuntimeBroker.exe	cmd.exe
PID 1764 wrote to memory of 1372	1764	RuntimeBroker.exe	cmd.exe
PID 1764 wrote to memory of 1372	1764	RuntimeBroker.exe	cmd.exe
PID 1764 wrote to memory of 1472	1764	RuntimeBroker.exe	cmd.exe
PID 1764 wrote to memory of 1472	1764	RuntimeBroker.exe	cmd.exe
PID 1764 wrote to memory of 1472	1764	RuntimeBroker.exe	cmd.exe
PID 1472 wrote to memory of 1112	1472	cmd.exe	timeout.exe
PID 1472 wrote to memory of 1112	1472	cmd.exe	timeout.exe
PID 1472 wrote to memory of 1112	1472	cmd.exe	timeout.exe
PID 1372 wrote to memory of 1172	1372	cmd.exe	schtasks.exe
PID 1372 wrote to memory of 1172	1372	cmd.exe	schtasks.exe
PID 1372 wrote to memory of 1172	1372	cmd.exe	schtasks.exe
PID 1472 wrote to memory of 2040	1472	cmd.exe	svchost.exe
PID 1472 wrote to memory of 2040	1472	cmd.exe	svchost.exe
PID 1472 wrote to memory of 2040	1472	cmd.exe	svchost.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
"C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1764

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1372

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
3⤵
- Creates scheduled task(s)
PID:1172

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBA5.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:1472

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1112

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2040

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
62KB

MD5
3ac860860707baaf32469fa7cc7c0192

SHA1
c33c2acdaba0e6fa41fd2f00f186804722477639

SHA256
d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

SHA512
d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5CE7.tmp
Filesize
164KB

MD5
4ff65ad929cd9a367680e0e5b1c08166

SHA1
c0af0d4396bd1f15c45f39d3b849ba444233b3a2

SHA256
c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

SHA512
f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBA5.tmp.bat
Filesize
150B

MD5
ddcf2f67b40c79fd46d768e4aff7b58b

SHA1
15935b22a3ed5021c5e98b7ee9c6dde964946a17

SHA256
2d0cdc0239ca29642b3d76f9a3289969005b039df395c1ba739814e0e1db7e26

SHA512
698f435ce54f9ba0c4897bd1c54a13068906752342f45d1e6c557ee2a34676739cafb60db26042872f03e6b47e0a8bd4c6283699df94a2fd7c24b95603556e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBA5.tmp.bat
Filesize
150B

MD5
ddcf2f67b40c79fd46d768e4aff7b58b

SHA1
15935b22a3ed5021c5e98b7ee9c6dde964946a17

SHA256
2d0cdc0239ca29642b3d76f9a3289969005b039df395c1ba739814e0e1db7e26

SHA512
698f435ce54f9ba0c4897bd1c54a13068906752342f45d1e6c557ee2a34676739cafb60db26042872f03e6b47e0a8bd4c6283699df94a2fd7c24b95603556e6b

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
63KB

MD5
251e7183331025aac57c3965ca6bdb3b

SHA1
b7d7e6f953bf378dae8d9f666369d8e60e405e95

SHA256
ae799c3696cadbbe3a8d2036f67685e01f385f214f47b0c7d094a15159688e71

SHA512
0209d2916ec0a1c67043e04c2c4ce9a3b6401d437791581887fe3ba17f2eefdec35fe2adc79704868a1750977f0b9fb7a29c3fe68d4df9b5a494988757e1b453

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
63KB

MD5
251e7183331025aac57c3965ca6bdb3b

SHA1
b7d7e6f953bf378dae8d9f666369d8e60e405e95

SHA256
ae799c3696cadbbe3a8d2036f67685e01f385f214f47b0c7d094a15159688e71

SHA512
0209d2916ec0a1c67043e04c2c4ce9a3b6401d437791581887fe3ba17f2eefdec35fe2adc79704868a1750977f0b9fb7a29c3fe68d4df9b5a494988757e1b453

Download Submit
memory/1764-54-0x0000000000BE0000-0x0000000000BF6000-memory.dmp

Filesize
88KB

Download
memory/1764-55-0x000000001B0A0000-0x000000001B120000-memory.dmp

Filesize
512KB

Download
memory/2040-68-0x0000000000E70000-0x0000000000E86000-memory.dmp

Filesize
88KB

Download
memory/2040-86-0x00000000005F0000-0x0000000000624000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads